Answer:
I really hope this helped❤
Explanation:
welll, in chemistry and physics, the Avogardo constant is the number of constituent particles, usually atoms or molecules that are contained in the amount of substance given by one mole and is equal to 6.02 × 10**23. so 3 moles of carbon atoms would be 18.06 × 10**23.
How do I balance this science equation?
Selah is making a mobile of an atom of beryllium to hang from the ceiling in her science class. She uses a clear plastic bag for the nucleus and fills it with white foam balls for protons and black foam balls for neutrons. She suspends blue foam balls from strings around the nucleus to represent the electrons. Which diagram shows Selah's model?
Answer:
See explanation
Explanation:
The question is incomplete because the images of the models are absent. However, i will try to give you a general description of what the correct answer should be.
Beryllium is a member of group 2 in the periodic table. Beryllium has an atomic number of 4. This implies that it has four protons in its nucleus and four electrons in its shells. In a neutral atom, the number of electrons on the shells is equal to the number of protons in the nucleus.
The electronic configuration of Beryllium is 1s2 2s2. This implies that it should have two shells each containing only two electrons each.
Since we are using white foam balls for protons and black foam balls for neutrons, the clear plastic will contain four white foam balls and five black foam balls since the mass number of beryllium is 9 and number of neutrons = mass number - number of protons.
Four blue foam balls hanging from strings will represent the electrons around the nucleus.
Any model that corresponds to the description above is the correct answer.
Answer:
my answer isnt any better than hers
Explanation:
Which of the following best illustrates the law of corkervation of energy?
A
The work done stretching a spring is transformed into stored energy in the spring
B
Leak-proof batteries are able to store chemical energy for long periods of time.
С
Ajogger conserves her energy by reducing the rate at which she jogs.
D
Ice water changes into liquid water when it absorbs heat energy.
Answer:
A . The work done stretching a spring is transformed into stored energy in the spring
Explanation:
The work done stretching a spring is transformed into stored energy in the spring is clear indication of the law of conservation of energy.
The law of conservation of energy states that "energy is neither created nor destroyed but transformed from one form to another".
In this problem, mechanical energy is used to stretch the spring. The mechanical energy is converted to stored potential energy.This is an energy transformation process.
A doctor uses an instrument(s) that emits light and allows the doctor to view the inside of a patient’s intestine.
What is the doctor most likely using?
a telescope
a microscope
laser beams
fiber optics
Answer:
I'd say telescope
Explanation:
A microscope is used to observe particles that cannot be seen with the naked eye
Answer:
its fiber optics. the other answers don't make sense.
Explanation:
How would the seasons be different if the Earth didn’t tilt on its axis? *
Answer:
If the earth had on Axis, there will be no seasons.
When something about the size of mars clashed with Earth about 4.5 billion years ago, it hit off a piece that became the moon.
All energy originates from the _________.
A. sun
B. mitochondria
C. biomass
D. chloroplast
Answer:
The sun.
Explanation:
:)) :) :):)) :)
Answer:
A
Explanation:
All energy originates from the sun.
How do the elements in each group differ? How are they similar?
Explanation:
All the elements in one group have the same number of valence electrons. The valence electrons are those on the energy level the most distant from the nucleus. These valence electrons are those involved in bonding with other atoms to form compounds.
In the periodic table elements in the same group posses similar physical and chemical property and this is due to the similarity in the number of valence electrons found in their valence shells.
While in the periodic table as we move down a group the atomic number of the elements will continue to increase because elements in the same group are located in different periods as well.
Hence we can conclude that the difference in the elements located in a group is that they have different atomic numbers while the similarities is that the posses the same number of valence electrons.
Learn more : https://brainly.com/question/21938331
Calculate how much Kool-aid you will need to make 0.5 L of each of the following solutions: 0.1M, 0.4M, & 0.7M.
(Hint: kool aid is mostly sucrose (C12 H22 O11), so you can assume that the “molar mass” of Kool aid is the same as the molar mass of sucrose). Show all work! Don’t forget units.
The “molar mass” of kool aid:
Mass of kool aid needed for 0.1 M solution:
Mass of kool aid for 0.4 M solution:
Mass of kool aid for 0.7 M solution:
Answer:
the 4th option
Explanation:
because i said so
what type of element is gold?
Answer:
Transition metal
Explanation:
Where is it located?
-Gold is a transition metal meaning it is located in the center block of the periodic table
Where is it located?
-Gold is in group 11, period 6
How is it abbreviated?
-Gold is abbreviated commonly as Au.
Answer:
Transitional metal is the answer.
Explanation:
Gold is also a pure substance btw but the element is Transitional metal.
Hope this helps :D
Which of the following is the correct model of C6H14?
Answer:
This question is incomplete
Explanation:
This question is incomplete because of the absence of options. However, the compound C₆H₁₄ is hexane. Hexane is a member of saturated hydrocarbons (homologous series) called alkanes (with the general formula CₙH₂ₙ₊₂). The structure for an hexane is shown below
H H H H H H
I I I I I I
H - C - C - C - C - C - C - H
I I I I I I
H H H H H H
which can also be written as
CH₃CH₂CH₂CH₂CH₂CH₃
Answer:
This is the picture to go with it.
Explanation:
help me plz...........
Answer:
try use Google search
Explanation:
you need to use it
first to answer correctly gets 10 pts plus brainleist! (must answer correcty tho)
Answer:
Explanation:
sorry dont understand
Answer: D. The speed of rotation of the Earth on its axis
Explanation: How fast Earth spins determines the number of hours in a given day.
just seven please really need your help right now
Answer:
No
Explanation:
Because each planet has a different gravitational pull
Balance the following equation:
K+ H2O + H2 + KOH
Answer:
2K + 2H2O → H2 + 2KOH
Explanation:
Find how many atoms you have on both sides then add 2 to both sides.
Reactant: Products:
K: 1+1=2 K: 1+1=2
H: 2+2=4 H: 3+1=4
O: 1+1=2 O: 1+1=2
Therefore it is balanced. Hope this helps
When matter changes a liquid is it a physical change
Answer:
Yes.
Any physical change is reversible.
During a beta decay reaction, a(n)
is emitted from the reactant.
helium nucleus
O electron
O hydrogen nucleus
O proton
which element of the lanthanides series has the largest atomic radius
Answer:
Lathanum
Explanation:
______ is the type of heat that roasts the marshmallows.
A. Raditation
B. Conduction
C. Covection
Answer:
I think B
tell me if I'm wrong
what time of metamorphosing causes alot of changes in a rock
Answer:
What changes do metamorphic rocks undergo?
Metamorphism is the addition of heat and/or pressure to existing rocks, which causes them to change physically and/or chemically so that they become a new rock. Metamorphic rocks may change so much that they may not resemble the original rock.
Explanation:
What are 2 main factors that cause metamorphism in rocks?
The main factors that control metamorphic processes are:
The mineral composition of the parent rock.
The temperature at which metamorphism takes place.
The amount and type of pressure during metamorphism.
The types of fluids (mostly water) that are present during metamorphism.
The amount of time available for metamorphism.What are the 5 processes that affect rocks over time?
Several processes can turn one type of rock into another type of rock. The key processes of the rock cycle are crystallization, erosion and sedimentation, and metamorphism.
Which statement is true of rectangles Y and Z? Rectangle Y has a length of 6 and width of 4. Rectangle Z has a length of 4 and width of 3. They are congruent because their corresponding angles are congruent. They are similar because their corresponding angles are congruent. They are similar because their corresponding side lengths are proportional. They are not similar because their corresponding side lengths are not proportional.
Answer:
b
Explanation:
Answer:
ita b
Explanation:
trust fam
If a crystal lattice structure is so hard, what causes most ionic compounds to be brittle?
A. Applying force, such as striking the crystal with a hammer, can release protons, causing ions of similar charges to align, repel each other, and dissolve the crystal.
B. Applying force, such as striking the crystal with a hammer, can release electrons, causing ions to alter their charges, repel each other, and dissolve the crystal.
C. Applying force, such as striking the crystal with a hammer, can shift one layer of ions, causing ions of different charges to align, repel each other, and fragment the crystal.
D. Applying force, such as striking the crystal with a hammer, can shift ions, causing ions of similar charges to align, repel each other, and fragment the crystal.
Explanation:
The cations and anions are locked tightly into place because of the attraction of their opposite charges - as a result, it's difficult to move the ions and the material is very hard.
Answer:
d
Explanation:
https://chemistry.stackexchange.com/questions/33322/why-are-so-many-ionic-compounds-brittle
why do apple, potato, and onion all taste the same if you eat them with your nose plugged
Answer:
When bit into without the onion's outermost skin, apples and onions share an extremely similar crunch. ... The flavors of the apple neutralize the onions pungency. So there you have it, if you plug your nose, close your eyes and bite into an onion...it is indistinguishable from an apple... until your nostrils open again.
Explanation:
Answer:
Apples, potatoes and onions will all taste the same if somehow you were to block your sense of smell (plug your nose).
Explanation:
What is the value of 100 ºC on the Kelvin scale? A. 100 K B. 273 K C. 373 K D. -373 K E. -300 K
Answer:
373.15 K
Explanation:
Given data:
Temperature in degree Celsius = 100°C
Temperature in kelvin scale = ?
Solution:
To convert the degree Celsius into kelvin scale we add the given degree Celsius into 273.15.
100°C +273.15 = 373.15 K
Answer:
C. 373K
Explanation:
I need help this is 7th grade science
Answer:
i need to know the question then i can help :)
Explanation:
Question 2 (1 point) The chemical formula for an ionic compound represents the a b number of ions in each molecule. total number of ions in the crystal lattice. number of atoms in each molecule simplest ratio of ions that results in an electrically neutral compound.
The chemical formula for an ionic compound represents the simplest ratio of ions that results in an electrically neutral compound. That is option D.
What is an ionic chemical compound?An ionic chemical compound is defined as the type of chemical compound that contains both the oppositely-charged ions of a metal and a nonmetal are attracted reacting with each other to form an ionic bond.
When represented as a chemical formula, it is the simplest ratio of ions that results in an electrically neutral compound.
Learn more about ionic compound here:
https://brainly.com/question/28851190
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Ben has two gold color nuggets that look identical. However, the density of the first nugget is 4.2 g/mL and the second is 19.3 g/mL.
Are the nuggets made out of the same substance?
HELP ME PLS!! I FORGOT TO STUDY Which may result from an increase in friction?
decreased traction
increased speed
reduced wear and tear
generation of heat
Answer: Generation of heat
Explanation: 1, 2 and 3 are wrong because traction actually increases, speed decreases and wear and tear is produced.
Hope this helps you, love!
Answer:
A, C, and D
Explanation:
I really need help with this ASAP
Answer:
1) Reaction rate, in chemistry, the speed at which a chemical reaction proceeds. It is often expressed in terms of either the concentration (amount per unit volume) of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time.
2) By collecting the hydrogen gas that is produced over water or in a syringe, rate graphs can be produced. The volume of gas produced and the time taken need to be recorded. The rate of the same reaction could be monitored by measuring the change in the mass of reactants as they react to form products.
what is a significant figure of 0.502 ?
terry usually rides his bike at 15 mph. if his riding speed is reduced by 3 mph,
Answer: 12
Explanation: gaming
